In "The deadliest Tsunami in History", The cause of the Indian Ocean tsunami was

A. a rupture in the Burma plate
B. an unintended explosion in Japan
C. A tornado off the coast of Sumatra
D. mass animal migrations to the north

A. a rupture in the Burma plate

The cause of the Indian Ocean tsunami, also known as the deadliest tsunami in history, was A. a rupture in the Burma plate.

To determine the cause of the Indian Ocean tsunami, we need to gather information about historical events related to tsunamis in that region. One way to do this is to conduct an online search using reliable sources such as news articles, scientific journals, or resources from reputable organizations. Here's how you can find the answer:

1. Go to a search engine (such as Google) and enter the keywords "cause of Indian Ocean tsunami."
2. Look for credible sources that provide information on the topic. Examples of dependable sources may include government websites, news outlets like BBC or CNN, or scientific institutions like National Geographic or NOAA (National Oceanic and Atmospheric Administration).
3. Click on relevant search results that indicate they contain information about the cause of the Indian Ocean tsunami.
4. Read the content of these sources and look for specific references to the cause of the tsunami. Pay attention to details and make note of any consistent information.
5. Compare the information from different sources to identify any common explanations for the cause of the Indian Ocean tsunami.
6. Based on the information you have gathered, determine the most frequently cited cause or causes of the Indian Ocean tsunami.

Note that it's important to verify the credibility of the sources you consult, as misinformation can exist online. Always rely on authoritative and trustworthy sources to ensure the accuracy of the information.